| (19) |
 |
|
(11) |
EP 0 561 178 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
12.04.1995 Bulletin 1995/15 |
| (43) |
Date of publication A2: |
|
22.09.1993 Bulletin 1993/38 |
| (22) |
Date of filing: 20.02.1993 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FR GR IE IT LI LU MC NL PT SE |
| (30) |
Priority: |
14.03.1992 GB 9205655
26.06.1992 GB 9213626
|
| (71) |
Applicant: ROKE MANOR RESEARCH LIMITED |
|
Romsey,
Hampshire, SO51 0ZN (GB) |
|
| (72) |
Inventor: |
|
- Manning, Kevin Ross
Southampton,
Hampshire SO4 3UW (GB)
|
| (74) |
Representative: Allen, Derek |
|
Siemens Group Services Limited
Intellectual Property Department
Roke Manor
Old Salisbury Lane
Romsey
Hampshire SO51 0ZN
Romsey
Hampshire SO51 0ZN (GB) |
|
| |
|
| (54) |
Improvements in or relating to surface curvature measurement |
(57) Apparatus for the measurement of the curvature of a surface comprising at least one
source of electromagnetic radiation, electro-magnetic radiation detector means, lens
means positioned and arranged to focus source radiation reflected from the said surface
onto the said detector means, characterised in that the said detector means is arranged
to provide an output signal characteristic of a position thereon whereat the radiation
is incident and signal processor means responsive to the said output signal for providing
an indication appertaining to curvature of the said surface.